Balance sheet information - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 20,444	$ 19,317
Less accumulated depreciation and amortization	(14,789)	(12,330)
Property and equipment, net	5,655	6,987	[1]
Depreciation and amortization expense	2,700	2,300		$ 1,700
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,448	7,930
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,866	2,858
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,338	2,107
Automobiles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	815	819
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,977	$ 5,603

[1] See Note 1 for a summary of adjustments.